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Bi Fold Door Repair - How to Fix Leaning Doors Without Removing the Hinges Bi-fold doors can be a fashionable and practical method to connect your outdoor and indoor areas. But, like every other door system, they need to be maintained properly to function properly. This can be accomplished by cleaning and lubricating all mechanisms, including the lock, to ensure they function properly. This will help prevent issues that could cause them to fall or become misaligned. How to Fix a Leaning door